Warning sirens and the monthly test

Hawaiʻi tests its outdoor warning sirens on the first working day of each month at 11:45 a.m. with a one-minute steady tone. If sirens sound at any other time, treat it as real and turn on local radio, TV or check your phone for alerts.

• Test: first working day of the month, 11:45 a.m. HST, about one minute, steady tone. No drill goes with it.
• Any other time: a siren means an emergency such as a tsunami or other hazard. Get official instructions right away.
• Where to get instructions: local radio and TV, and Wireless Emergency Alerts on your phone.
• Tsunami: if you are near the coast and told to evacuate, go inland or to higher ground.

Sources: Hawaiʻi Emergency Management Agency · Spectrum News: Monthly siren test notice

Last checked Oct. 29, 2026. Hours, fees and rules can change, so confirm with the official source before you go.